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首页> 外文期刊>Advanced Functional Materials >Electrical Writing onto a Dynamically Responsive Polysaccharide Medium: Patterning Structure and Function into a Reconfigurable Medium
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Electrical Writing onto a Dynamically Responsive Polysaccharide Medium: Patterning Structure and Function into a Reconfigurable Medium

机译：在动态响应多糖介质上的电写入：将结构和功能图案化为可重构介质

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摘要

Historically, paper is the medium to write information. Here, the concept of writing is expanded from the addition of mass (i.e., ink) onto a static polysaccharide medium (i.e., paper), to the addition of electrical energy to a dynamically reconfigurable polysaccharide medium. Specifically, a dual-responsive interpenetrating polysaccharide network is used as a dynamic medium. Electrical writing is achieved using an electrode pen to locally perform the cathodic electrolysis reactions that generate high-pH regions that neutralize the interpenetrating chitosan chains and induce their self-assembly into crystalline regions. Surprisingly, the gradients in structure induced by cathodic writing are stable even after the pH gradient has dissipated. Molecular modeling indicates that this stability results from structure-induced changes in chitosan's pK(a). Various experimental approaches demonstrate that the changes in structure generated by cathodic writing alter the medium's mechanical, chemical, and biological properties. Importantly, the structure and information imparted into the film is reversible allowing the medium to be erased and new information to be written. Broadly, this work demonstrates the use of top-down electrical inputs to induce bottom-up structural changes in a biopolymer-based medium and these structural changes fundamentally alter how this medium interacts chemically and biologically with its environment.
机译：从历史上看，纸是写信息的媒介。在此，书写的概念从将质量（即，墨水）添加到静态多糖介质（即，纸）上，到将电能添加到动态可重构多糖介质上而扩展了。具体地，双反应互穿多糖网络用作动态介质。使用电极笔在局部进行阴极电解反应可实现电写入，该反应产生高pH区域，该区域中和互穿的壳聚糖链并诱导其自组装成结晶区。出人意料的是，即使在pH梯度消失后，由阴极书写引起的结构梯度也是稳定的。分子建模表明，这种稳定性是由壳聚糖的pK（a）的结构诱导变化引起的。各种实验方法表明，通过阴极写入产生的结构变化会改变介质的机械，化学和生物学特性。重要的是，赋予胶片的结构和信息是可逆的，从而可以擦除介质并写入新信息。从广义上讲，这项工作演示了使用自上而下的电输入在基于生物聚合物的介质中引发自下而上的结构变化，这些结构变化从根本上改变了该介质与其环境发生化学和生物相互作用的方式。

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  • 来源
    《Advanced Functional Materials》 |2018年第40期|1803139.1-1803139.12|共12页
  • 作者

    Wu Si; Yan Kun; Zhao Yanan; Tsai Cheng-Chieh; Shen Jana; Bentley William E.; Chen Yun; Deng Hongbing; Du Yumin; Payne Gregory F.; Shi Xiaowen;

  • 作者单位

    Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Hubei, Peoples R China;

    Wuhan Text Univ, Sch Mat Sci & Engn, Wuhan 430200, Hubei, Peoples R China;

    Wuhan Univ, Dept Biomed Engn, Sch Basic Med Sci, Wuhan 430071, Hubei, Peoples R China;

    Univ Maryland, Sch Pharm, Dept Pharmaceut Sci, Baltimore, MD 21201 USA;

    Univ Maryland, Sch Pharm, Dept Pharmaceut Sci, Baltimore, MD 21201 USA;

    Univ Maryland, Inst Biosci & Biotechnol Res, Fischell Dept Bioengn, College Pk, MD 20742 USA;

    Wuhan Univ, Dept Biomed Engn, Sch Basic Med Sci, Wuhan 430071, Hubei, Peoples R China;

    Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Hubei, Peoples R China;

    Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Hubei, Peoples R China;

    Univ Maryland, Inst Biosci & Biotechnol Res, Fischell Dept Bioengn, College Pk, MD 20742 USA;

    Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Hubei, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    electrical writing; hydrogel; polysaccharide; self-assembly;

    机译：电书写;水凝胶;多糖;自组装;

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